Herewith filter element and filter module

Abstract

The invention relates to a filter element ( 1 ) with one filter tube ( 10 ), which has a cavity ( 11 ) and a first and a second end ( 12, 13 ), wherein an access ( 20 ) into the cavity ( 11 ) with an access channel ( 21 ) is formed at the first end ( 12 ) of the filter tube ( 10 ). The access channel ( 21 ) is designed as a Venturi tube ( 22 ) with a cross-sectional constriction ( 23 ).

1 . Filter element ( 1 ) with a filter tube ( 10 ) which has a cavity ( 11 ) and a first and a second end ( 12 ,  13 ), an access ( 20 ) into the cavity ( 11 ) with an access channel ( 21 ) being constructed at the first end ( 12 ) of the filter tube ( 10 ), characterized in that the access channel ( 21 ) is constructed as a Venturi tube ( 22 ) with a narrowed cross-section ( 23 ). 
     
     
         2 . Filter element ( 1 ) according to  claim 1 , characterized in that
 the cross-sectional constriction ( 23 ) comprises a conical taper ( 24 ) in the direction of the cavity ( 11 ); and/or   the cross-sectional constriction ( 23 ) has a conical widening ( 25 ) in the shape of a cone in the direction of the cavity ( 11 ).   
     
     
         3 . Filter element ( 1 ) according to  claim 1 . characterized in that the access channel ( 21 ) comprises a cylindrical end section ( 27 ) on the side facing the filter tube ( 10 ). 
     
     
         4 . Filter element ( 1 ) according to  claim 1 . characterized in that the cavity ( 11 ) has a length (L) between the first and second ends ( 12 ,  13 ) which is at least four times as great as a width of the cavity ( 11 ) in the transverse direction thereto. 
     
     
         5 . Filter element ( 1 ) according to  claim 1 . characterized in that the access channel ( 21 ) takes the form of an end piece ( 30 ) which is connected to the filter tube ( 10 ). 
     
     
         6 . Filter element ( 1 ) according to  claim 5 , characterized in that the access channel ( 21 ) in the end piece ( 30 ) has a diameter (D 3 ) at the end pointing towards the filter tube ( 10 ) which is smaller than a diameter (D 4 ) at the end pointing away from the filter tube ( 10 ). 
     
     
         7 . Filter element ( 1 ) according to  claim 5 . characterized in that the end piece ( 30 ) has a receiving groove ( 39 ) on the side facing the filter tube ( 10 ), into which groove the filter tube ( 10 ) is axially inserted. 
     
     
         8 . Filter element ( 1 ) according to  claim 1 . characterized in that the filter tube ( 10 ) has a layered structure with a support tube ( 14 ) and at least one filter material ( 15 ,  16 ). 
     
     
         9 . Filter element ( 1 ) according to  claim 1 . characterized in that a tubular plug-in coupling section ( 31 ) with an outer circumference ( 32 ) as well as a free end (E) for axial insertion into a mounting opening ( 70 ) is formed in the region of the access ( 20 ), at least two radial passage openings ( 36 ) being formed in the plug-in coupling section ( 31 ), which are arranged in at least two planes axially offset from one another and which each communicate a radial environment around the outer circumference ( 32 ) with the access channel ( 21 ). 
     
     
         10 . Filter element ( 1 ) in accordance with  claim 9 , characterized in that at least six radial passage openings ( 36 ) are formed in the plug-in coupling section ( 31 ), which are arranged in at least two planes axially offset from one another, and each of which connects a radial environment around the outer circumference ( 32 ) to the access channel ( 21 ). 
     
     
         11 . Filter element ( 1 ) according to  claim 9 . characterized in that the radial passage openings ( 36 ) are distributed over a circumference of the plug-in coupling section ( 31 ). 
     
     
         12 . Filter element ( 1 ) according to  claim 9 , and characterized in that one, two or at least two sealing grooves ( 33 ,  34 ) for one sealing ring ( 60 ,  61 ), respectively are formed in the outer circumference ( 32 ) of the plug-in coupling section ( 31 ), the through-openings ( 36 ) being arranged between the free end (E) of the plug-in coupling section ( 31 ) and that of the sealing grooves ( 36 ) which is arranged furthest away from the free end (E). 
     
     
         13 . Filter element ( 1 ) in accordance with  claim 9 . characterized in that at least two sealing grooves ( 33 ,  34 ) are provided and the passage opening ( 36 ) is arranged between the two sealing grooves ( 33 ,  34 ). 
     
     
         14 . Filter element ( 1 ) according to  claim 9 , and characterized in that a cross-sectional area of the respective passage opening ( 36 ) is smaller than one percent of the smallest cross-sectional area (A 2 ) of the access channel ( 21 ) ( 22 ). 
     
     
         15 . Filter module ( 50 ) with a filter housing ( 51 ), which forms a housing cavity ( 52 ) with a filter inlet ( 53 ) and a filter outlet ( 54 ), as well as with at least one filter element ( 1 ) according to  claim 1  in the housing cavity ( 52 ), wherein the filter inlet ( 53 ) or the filter outlet ( 54 ) opens into the access opening ( 20 ) of the filter element ( 1 ) and is thereby flow-connected to the housing cavity ( 52 ) via a filter element ( 1 ).